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Finding the Fourth Proportional to 553,363.92, 763,679.36 and 308,386.72

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Solution

The fourth proportional to 553,363.92, 763,679.36 and 308,386.72 is: 425,594.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,363.92 : 763,679.36 = 308,386.72 : x
  2. Step 2: Convert to fraction form
    553,363.92/763,679.36 = 308,386.72/x
  3. Step 3: Cross multiply
    553,363.92x = 763,679.36 × 308,386.72
  4. Step 4: Simplify right side
    553,363.92x = 235,508,572,962.10
  5. Step 5: Solve for x
    x = 235,508,572,962.10/553,363.92
  6. Step 6: Final answer
    x = 425,594.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.